一个简单hello world程序

#include <windows.h>
LRESULT CALLBACK WndProc (HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain (HINSTANCE hInstance,HINSTANCE hPrevInstance,
PSTR szCmdLine,int iCmdShow)
{
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
char *szname ="mypro";

wndclass.style = CS_HREDRAW|CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wndclass.hCursor = LoadCursor (NULL,IDC_ARROW);
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szname;

if(!RegisterClass (&wndclass))
return 0;
hwnd = CreateWindow (szname,
TEXT("the hello programe"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
345,
286,
NULL,
NULL,
hInstance,
NULL);
ShowWindow (hwnd,iCmdShow);
UpdateWindow(hwnd);

while (GetMessage (&msg,NULL,0,0))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
return msg.wParam;
}

LRESULT CALLBACK WndProc (HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;

switch(message)
{

case WM_PAINT:
hdc=BeginPaint (hwnd,&ps);
GetClientRect(hwnd,&rect);
DrawText (hdc,TEXT("hello world"),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
EndPaint (hwnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd,message,wParam,lParam);
}